US6549176B2ExpiredUtilityPatentIndex 94

RFID tag having integral electrical bridge and method of assembling the same

Assignee: MOORE NORTH AMERICA INCPriority: Aug 15, 2001Filed: Aug 15, 2001Granted: Apr 15, 2003

Est. expiryAug 15, 2021(expired)· nominal 20-yr term from priority

Inventors:HAUSLADEN MICHAEL C

G06K 19/07749G06K 19/0775H01Q 7/00H01Q 1/2225G06K 19/07783G06K 19/07779Y10T29/49202

PatentIndex Score

Cited by

References

Claims

Abstract

A radio frequency-identification (RFID) tag comprises a substrate, a single, continuous antenna having a plurality of spiral turns and end portions that are integral with the spiral turns, and an integrated circuit. The spiral turns are disposed on the substrate and at least one of the end portions crosses over at least some of the spiral turns. One end portion of the antenna is integrally connected to the innermost spiral turn and extends toward an outermost spiral turn to cross over at least some of the spiral turns. Another end portion of the antenna may be integrally connected to the outermost spiral turn and extend toward the innermost spiral turn to cross over at least some of the other spiral turns. The end portion(s) may cross over the spiral turns on the side of the substrate on which the spiral turns are disposed or on the opposite side.

Claims

exact text as granted — not AI-modified

What is claimed is:  
     
       1. A radio frequency identification (RFID) tag comprising: 
       a substrate;  
       a continuous antenna having a plurality of spiral turns and an end portion that is integral with the spiral turns, the spiral turns being disposed on the substrate and the end portion crossing over at least one of the spiral turns; and  
       an integrated circuit coupled to the substrate and electrically connected to the antenna.  
     
     
       2. The tag as in  claim 1  further comprising non-conductive insulation arranged between the end portion and the at least one spiral turn that the end portion crosses. 
     
     
       3. The tag as in  claim 1  further comprising an electrical trace disposed on the substrate adjacent to an outermost spiral turn of the antenna. 
     
     
       4. The tag as in  claim 1  wherein the end portion is integrally connected to an innermost spiral turn and extends toward an outermost spiral turn to cross over at least some of the spiral turns. 
     
     
       5. The tag as in  claim 4  wherein the end portion crosses over all of the spiral turns by extending from the innermost spiral turn to the outermost spiral turn and is connected to one end of an electrical trace that is disposed on the substrate adjacent to the outermost spiral turn, the other end of the electrical trace being connected to the integrated circuit. 
     
     
       6. The tag as in  claim 5  further comprising non-conductive insulation arranged between the end portion and the spiral turns of the end portion crosses. 
     
     
       7. The tag as in  claim 1 , wherein the integrated circuit is coupled to the substrate at a location outside of at least all of spiral turns inside the outermost spiral turn. 
     
     
       8. A radio frequency identification (RFID) tag comprising: 
       a substrate;  
       a continuous antenna including a plurality of spiral turns, a first end portion and a second end portion, the first and second end portions being integral with the spiral turns; and  
       an integrated circuit electrically connected to the antenna;  
       the spiral turns of the antenna being disposed on the substrate, the first end portion crossing over at least a first one of the spiral turns, and a second end portion crossing over at least a second one of the spiral turns.  
     
     
       9. The tag as in  claim 8  wherein the first end portion is integrally connected to an innermost spiral turn of the antenna and extends toward an outermost spiral turn of the antenna. 
     
     
       10. The tag as in  claim 8  wherein the second end portion is integrally connected to an outermost spiral turn of the antenna and extends toward an innermost spiral turn of the antenna. 
     
     
       11. The tag as in  claim 9  wherein the second end portion is integrally connected to an outermost spiral turn of the antenna and extends toward an innermost spiral turn of the antenna. 
     
     
       12. The tag as in  claim 8  further comprising non-conductive insulation which is arranged between the first end portion and the at least a first one of the spiral turns and between the second end portion and the at least a second one of the spiral turns. 
     
     
       13. The tag as in  claim 8  further comprising non-conductive insulation which is arranged between the integrated circuit and at least some of the spiral turns. 
     
     
       14. The tag as in  claim 8  wherein the first end portion crosses over the at least a first one of the spiral turns on a side of the substrate on which the spiral turns of the antenna are not disposed and the second end portion crosses the at least a second one of the spiral turns on the side of the substrate on which the spiral turns of the antenna are not disposed. 
     
     
       15. The tag as in  claim 14  wherein the integrated circuit is disposed on the side of the substrate on which the spiral turns of the antenna are not disposed and the integrated circuit is connected to both the first and second end portions. 
     
     
       16. A method of making an RFID tag comprising: 
       providing a substrate;  
       integrally forming a continuous antenna having a plurality of spiral turns and an end portion;  
       disposing the spiral turns on the substrate and folding the end portion of the antenna so that the end portion crosses over at least one of the spiral turns; and  
       connecting an integrated circuit to the antenna.  
     
     
       17. The method as in  claim 16  further comprising arranging non-conductive insulation between the end portion and the at least one spiral turn that the end portion crosses. 
     
     
       18. The method as in  claim 17  further comprising disposing an electrical trace on the substrate adjacent to an outermost spiral turn of the antenna. 
     
     
       19. The method as in  claim 17  wherein the end portion is integrally connected to an innermost spiral turn and extends toward an outermost spiral turn to cross over the at least one spiral turn. 
     
     
       20. The method as in  claim 19  wherein the end portion crosses over all of the spiral turns by extending from the innermost spiral turn to the outermost spiral turn and is connected to one end of an electrical trace that is disposed on the substrate and adjacent to the outermost spiral turn, the other end of the electrical trace being connected to the integrated circuit. 
     
     
       21. The method as in  claim 20  further comprising arranging non-conductive insulation arranged between the end portion and the spiral turns of the antenna the end portion crosses. 
     
     
       22. The method of  claim 16 , wherein the integrated circuit is coupled to the substrate at a location outside of at least all of spiral turns inside the outermost spiral turn. 
     
     
       23. A method making a radio frequency identification (RFID) tag comprising: 
       providing a substrate;  
       integrally forming a continuous antenna having a plurality of spiral turns, a first end portion and a second end portion;  
       disposing the antenna on the substrate;  
       folding the first end portion so that the first end portion crosses over at least a first one of the spiral turns and folding the second end portion so that the second end portion crosses over at least a second one of the spiral turns; and  
       electrically connecting an integrated circuit to the antenna.  
     
     
       24. The method as in  claim 23  wherein the first end portion is integrally connected to an innermost spiral turn of the antenna and extends toward an outermost spiral turn of the antenna. 
     
     
       25. The method as in  claim 23  wherein the second end portion is integrally connected to an outermost spiral turn of the antenna and extends toward an innermost spiral turn of the antenna. 
     
     
       26. The method as in  claim 24  wherein the second end portion is integrally connected to an outermost spiral turn of the antenna and extends toward an innermost spiral turn of the antenna. 
     
     
       27. The method as in  claim 23  further comprising arranging non-conductive insulation between the first end portion and the at least a first one of the spiral turns and between the second end portion and the at least a second one of the spiral turns. 
     
     
       28. The method as in  claim 23  wherein the integrated circuit is arranged on a side of the substrate on which the spiral turns are disposed and over at least some of the spiral turns, and non-conductive insulation is arranged between the integrated circuit and the at least some of the spiral turns. 
     
     
       29. The method as in  claim 23  wherein the first end portion crosses over the at least a first one of the spiral turns on a side of the substrate on which the spiral turns of the antenna are not disposed and the second end portion crosses the at least a second one of the spiral turns on a side of the substrate on which the spiral turns of the antenna are not disposed. 
     
     
       30. The method as in  claim 29  wherein the integrated circuit is disposed on the substrate on which the spiral turns of the antenna are not disposed and the integrated circuit is connected to both the first and second end portions.

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.